To provide a liquid feeding pump for feeding various kinds of processing liquid used in development processing of a film or photosensitive material, surely preventing a back flow of the processing liquid and feeding a minute amount of the processing liquid with simple structure not using an electronic circuit or the like for controlling a valve.

The present invention employs the liquid feeding pump 100 comprises a volume variation means 1, a first valve, a second valve 3, a drive means 4, a valve means 5. The valve means 5 of the liquid feeding pump 100 cuts off a pipe in synchronization with completion of a liquid draining process of the volume variation means 1.